Can end with bonded seal slide

ABSTRACT

A can end is provided with a pour opening having a pour width. The pour opening is provided with an entry aperture at one end of the pour opening. The entry aperture has a slide width greater than the pour width. The can end has a can end lapping portion and a can end sealing portion adjacent the pour opening and a plane of bulge strength adjacent the entry aperture. A slide has a pivot on the can end, is adapted to pass through the entry aperture and has a slide lapping portion and a slide sealing portion. The slide lapping portion is adapted to register with the can end lapping portion, and the slide sealing portion is adapted to register with the plane of bulge strength. A pull tab has a connection to the slide. Engaging means engage the can end lapping portion to press the can end lapping portion into intimate contact with the slide lapping portion and the slide sealing portion into intimate contact with the plane of bulge strength. A pressure barrier material is used for sealing the intimately contacting can end sealing portion and the slide lapping portion and also for sealing the intimately contacting plane of bulge strength and the slide sealing portion. The pressure barrier material is bonded to the can end sealing portion with a first predetermined shear strength and to the slide lapping lapping portion and to the plane of bulge strength with a second predetermined shear strength less than the first predetermined shear strength. The pull tab is rotatable about the pivot to break the bond between the slide lapping portion and the pressure barrier material adjacent the can end sealing portion so that the pressure barrier material adjacent the can end sealing surface now functions as an exit and reclosure slide guide. The pull tab causes breakage of the bond between the pressure barrier material adjacent the plane of bulge strength and the slide sealing portion and causes the slide to move through the entry aperture on the pressure barrier material adjacent the plane of bulge strength and such pressure barrier material to act as a guide to uncover the pour opening.

United States Patent I Douty [451 Dec. 12, 1972 [541 CAN END WITl-lBONDED SEAL SLIDE [73] Assignee: United States Steel Corporation [22]Filed: Jan. 28, 1972 [21] Appl. No.: 221,548

Related U.S. Application Data [62] Division of Ser. No. 146,945, May 26,1971, which is a division of Ser. No. 61,384, Aug. 5, 1970,1at. No.

[52] U.S. Cl. ..222/541, 222/560, 222/561, x I 220/41, 220/53 [51]' Int.Cl. .L ..B65d'47/l0 [58] Field of Search ..222/541, 559, 560, 561, 153,222/555; 220/41, 47, 53, 54, 23, 46; 222/7 Primary Examiner-Stanley H.Tollberg Attorney-Robert J. Leek, Jr. 1

[5 7] ABSTRACT A can end is provided with a pour opening having a pourwidth. The pour opening is provided with an entry aperture at one end ofthe pour opening. The entry aperture has a slide width greater than thepour width. The can end has a can end lapping portion and a can endsealing portion adjacent the pour opening and a plane of bulge strengthadjacent the entry aperture. A slide has a pivot on the can end, isadapted to pass through the entry aperture and has a slide lappingportion and a slide sealing portion. The slide lapping portion isadapted to register with the can end lapping portion, and the slidesealing portion is adapted to re- 'gister with the plane of bulgestrength. A pull tab has a connection to the slide. Engaging meansengage the can end lapping portion to press the can end lapping portioninto intimate contact with the slide lapping portion and the slidesealing portion into intimate contact with the plane of bulge strength.A pressure barrier material is used ,for sealing the intimatelycontacting can end sealing portion and the slide lapping portion andalso for sealing the intimately contacting plane of bulge strength andthe slide sealing portion. The pressure barrier material is bonded tothe can end sealing portion with a first predetermined shear strengthand to the slide lapping lapping portion and to the plane of bulgestrength with a second predetermined shear strength less than the firstpredetermined shear strength. The pull tab is rotatable about the pivotto break the bond between the slide lapping portion and the pressurebarrier material adjacent the can end sealing portion so that thepressure barrier material ad'acent the can end sealin surface now funtions as ari exit and reclosure sli e guide. The pul tab causes breakageof the bond between the pressure barrier material adjacent the plane ofbulge strength and the slide sealing portion and causes the slide tomove through the entry aperture on the pressure barrier materialadjacent the plane of bulge strength and such pressure barrier materialto :act as a guide to uncover the pour opening.

9 laims, myrawjna r PKTE'N'TED um: 12 m2 SHEET OZUF 34 mm 2. 2 mm/IIIIIIIIII PA TENTED 12 I973 SHEET OSUF 34 Yw N PATENTEI] DEC 12 I572SHEET OBUF 34 PATENTED DEC 12 I972} SHEET 100F311 PA'TENIED DEC 12 mmSHEET 11 0F 34 PATENTED DEC 12 I972 SHEET 12UF 34 PATENTED DEB 12 I972sum 13 0F 34 FIG. |2A

FIG. I28

PATENTED DEC 12 I972 SHEET 166F34 FIG. IBE

FIG. l3-F PATENTED DEC 12 m2 sum 17 0F 34

1. In combination: a. a can end provided with a pour opening having apour width,
 1. said pour opening being provided with an entry apertureat one end of said pour opening, said entry aperture having a slidewidth greater than said pour width,
 2. said can end having a can endlapping portion and a can end sealing portion adjacent said pour openingand a plane of bulge strength adjacent said entry aperture, b. a slidehaving a pivot on said can end and adapted to pass through said entryaperture and having a slide lapping portion and a slide sealingportion,
 1. said slide lapping portion being adapted to register withsaid can end lapping portion, and
 2. said slide sealing portion beingadapted to register with said plane of bulge strength, c. a pull tabhaving a connection to said slide, d. engaging means engaging said canend lapping portion to press said can end lapping portion into intimatecontact with said slide lapping portion and said slide sealing portioninto intimate contact with said plane of bulge strength, e. a pressurebarrier material for sealing said intimately contacting can end sealingportion and said slide lapping portion and also for sealing saidintimately contacting plane of bulge strength and said slide sealingportion, 1 said pressure barrier material being bonded to said can endsealing portion with a first predetermined shear strength and to saidslide lapping portion and to said plane of bulge strength with a secondpredetermined shear strength less than said first predetermined shearstrength, f. said pull tab being rotatable about said pivot to break thebond between said slide lapping portion and said pressure barriermaterial adjacent said can end sealing portion so that said pressurebarrier material adjacent said can end sealing surface now functions asan exit and reclosure slide guide and to break the bond between saidpressure barrier material adjacent said plane of bulge strength and saidslide sealing portion and to cause said slide to move through said entryaperture on said pressure barrier material adjacent sAid plane of bulgestrength and on said pressure barrier material or as a guide to uncoversaid pour opening.
 2. said can end having a can end lapping portion anda can end sealing portion adjacent said pour opening and a plane ofbulge strength adjacent said entry aperture, b. a slide having a pivoton said can end and adapted to pass through said entry aperture andhaving a slide lapping portion and a slide sealing portion,
 2. saidslide sealing portion being adapted to register with said plane of bulgestrength, c. a pull tab having a connection to said slide, d. engagingmeans engaging said can end lapping portion to press said can endlapping portion into intimate contact with said slide lapping portionand said slide sealing portion into intimate contact with said plane ofbulge strength, e. a pressure barrier material for sealing saidintimately contacting can end sealing portion and said slide lappingportion and also for sealing said intimately contacting plane of bulgestrength and said slide sealing portion, 1 said pressure barriermaterial being bonded to said can end sealing portion with a firstpredetermined shear strength and to said slide lapping portion and tosaid plane of bulge strength with a second predetermined shear strengthless than said first predetermined shear strength, f. said pull tabbeing rotatable about said pivot to break the bond between said slidelapping portion and said pressure barrier material adjacent said can endsealing portion so that said pressure barrier material adjacent said canend sealing surface now functions as an exit and reclosure slide guideand to break the bond between said pressure barrier material adjacentsaid plane of bulge strength and said slide sealing portion and to causesaid slide to move through said entry aperture on said pressure barriermaterial adjacent sAid plane of bulge strength and on said pressurebarrier material or as a guide to uncover said pour opening.
 2. Thecombination recited in claim 1 wherein said entry aperture is a slit. 3.The combination recited in claim 1 wherein said entry aperture is aslot.
 4. The combination recited in claim 1 wherein said entry apertureis provided with a slide guide means.
 5. The combination recited inclaim 1 wherein said slide has a bulge strength measured in pounds persquare inch equal to or greater than the bulge strength of said can end.6. The combination recited in claim 1 wherein said engaging means issaid pull tab engaging said can end lapping portion.
 7. The combinationrecited in claim 1 wherein said engaging means has a stationary membersupporting one member of said pull tab, said slide and said can end anda movable member engaging another member of said pull tab, said slideand said can end.
 8. The combination recited in claim 1 wherein saidpull tab is integral with said slide.
 9. The combination recited inclaim 1 wherein said pivot is integral with one of said can end and saidslide.
 10. The combination recited in claim 1 wherein said pivot isseparate from one of said can end and said slide.
 11. The combinationrecited in claim 1 wherein said engaging means is magnetic.
 12. Thecombination recited in claim 1 and having stop means on said slide forengaging said entry aperture to prevent said slide from leaving saidentry aperture.
 13. The combination recited in claim 1 wherein saidpivot is sealed to said can end by said pressure barrier material. 14.The combination recited in claim 1 wherein said pour opening is radial.15. The combination recited in claim 1 wherein said pour opening ischordal.
 16. The combination recited in claim 1 wherein said can end hasan embossment around said pour opening.
 17. The combination recited inclaim 16 wherein said embossment is upward.
 18. The combination recitedin claim 16 wherein said embossment is downward for vacuum sealing. 19.The combination recited in claim 1 wherein said slide has a locking tabfor engaging said can end.
 20. The combination recited in claim 1wherein said pour opening has substantially straight sides and saidentry aperture vents said can end when said pour opening is exposed. 21.The combination recited in claim 1 wherein said pour opening has arcuatesides and said entry aperture vents said pour opening when said pouropening is exposed.
 22. The combination recited in claim 1 wherein saidpull tab is of the corrugated type.
 23. The combination recited in claim1 wherein said pull tab is of the ring type.
 24. The combination recitedin claim 1 wherein said pull tab is of the serrated type.
 25. Thecombination recited in claim 1 wherein said pull tab is of theprojecting type.
 26. The combination recited in claim 1 wherein saidpull tab is of the waffle type.
 27. The combination recited in claim 1wherein said pull tab has a plurality of protuberances.
 28. Thecombination recited in claim 1 wherein said pull tab has a plurality ofcavities.
 29. The combination recited in claim 1 wherein said pull tabis of the embossed aperture type.
 30. The combination recited in claim 1wherein said slide has a curve of bulge weakness adapted to follow thecurve of bulging in said can end.
 31. The combination recited in claim30 wherein said slide has an embossment adjacent said curve of bulgeweakness.
 32. The combination recited in claim 1 wherein said can end isprovided with a vent aperture and one vent closure portion of said slideor said pull tab is adapted to cover said vent aperture, said pressurebarrier material being adapted to seal said vent aperture to said onevent closure portion, said one vent closure portion being operable tobreak said seal between said vent aperture and said one vent closureportion when said slide moves out of said entry aperture.
 33. Thecombination recited in claim 32 wherein saiD vent aperture is providedwith a vent entry aperture.
 34. The combination recited in claim 33wherein said vent entry aperture is a slot.
 35. The combination recitedin claim 33 wherein said vent entry aperture is a slit.
 36. Thecombination recited in claim 33 wherein said vent entry aperture isprovided with a slide guide means.
 37. The combination recited in claim33 wherein said one vent closure portion has stop means for engagingsaid entry aperture to prevent said one vent closure portion fromleaving said entry aperture.
 38. The combination recited in claim 32wherein said one vent closure portion has a bulge strength measured inlbs./sq. inch equal to or greater than the bulge strength of said canend.
 39. The combination recited in claim 32 wherein said vent apertureis radial.
 40. The combination recited in claim 32 wherein said ventaperture is chordal.
 41. The combination recited in claim 32 whereinsaid can end has an embossment around said vent aperture.
 42. Thecombination recited in claim 41 wherein said vent aperture embossment isupward.
 43. The combination recited in claim 41 wherein said ventaperture embossment is downward for vacuum seals.
 44. The combinationrecited in claim 32 wherein said one vent closure portion has a lockingtab for engaging said can end.
 45. The combination recited in claim 32wherein said vent aperture has substantially straight sides.
 46. Thecombination recited in claim 32 wherein said vent aperture has arcuatesides.
 47. The combination recited in claim 32 and having vent closureengaging means, said vent closure engaging means having a stationarymember supporting one member of said pull tab, said slide and said canend and a movable member engaging another member of said pull tab, saidslide and said can end.
 48. The combination recited in claim 32 havingmagnetic type vent closure engaging means.
 49. The combination recitedin claim 32 wherein said one vent closure portion is integral witheither said slide or said pull tab.
 50. The combination recited in claim32 wherein said one vent closure portion is separate from either saidslide or said pull tab and having a vent closure connection forconnecting said one vent closure portion to either said slide or saidpull tab.
 51. The combination recited in claim 1 wherein said stop meansis on said can end.
 52. The combination recited in claim 1 and havingstop means on said one vent closure portion for limiting the movement ofsaid slide by engagement of said stop means with said can end.
 53. Thecombination recited in claim 32 wherein said pull tab is of theexpansion type.
 54. The combination recited in claim 32 wherein said onevent closure portion and said slide simultaneously move along a linearchordal path of movement to break the bonds between the pressure barriermaterial and the slide lapping portion, the pressure barrier materialand the plane of bulge strength and the pressure barrier material andsaid one vent closure portion.
 55. The combination recited in claim 32wherein said one vent closure portion and said slide move insubstantially parallel chordal movement to break the bonds between thepressure barrier material and the slide lapping portion, the pressurebarrier material and the plane of bulge strength and pressure barriermaterial and said one vent closure portion.
 56. The combination recitedin claim 54 wherein said slide has a dish portion and said slide ismovable outwardly from said can end away from said entry portion so thatsaid dish portion provides a pour lip for said pour opening.
 57. Thecombination recited in claim 54 wherein said slide is movable inwardlyof said can end away from said entry portion of said pour aperture tobreak said bonds.
 58. The combination recited in claim 32 wherein saidslide pivot is disposed outside of a pour opening closure portion ofsaid slide and said one vent closure portion.
 59. The combinationrecited in claim 32 wherein saId slide pivot is disposed between a pouropening closure portion of said slide and said one vent closure portion.60. The combination recited in claim 32 wherein said pull tab isdisposed between said one vent closure portion and a pour openingclosure portion of said slide, said pull tab being operable by upwardmovement of said pull tab away from said can end to move said one ventclosure portion and said pour opening closure portion inwardly from theperiphery of said can end during the bond breaking operation.
 61. Thecombination recited in claim 60 wherein said pull tab has stop meansassociated with said pull tab and said can end for limiting the upwardbond breaking movement of said pull tab.
 62. The combination recited inclaim 60 and having pressure barrier material sealed to said stop andsaid can end.
 63. The combination recited in claim 32 wherein said pulltab is of the expansion type.